<div dir="ltr"><a href="http://www.campussafetymagazine.com/article/lack_of_encryption_causes_dallas_emergency_siren_hack">http://www.campussafetymagazine.com/article/lack_of_encryption_causes_dallas_emergency_siren_hack</a><br><br><span><p>Dallas city officials
confirmed on Monday that a lack of encryption of the signal transmitted
to 156 warning sirens led to the hack that kept Dallas residents awake
late Friday and early Saturday.</p>
<p>City spokesperson Sana Syed told ABC affiliate <a href="http://www.wfaa.com/news/local/dallas-county/city-manager-dallas-siren-hack-a-radio-issue/430175138">WFAA-TV</a>
that city personnel had not set the system to use an encrypted signal
before the sirens were activated. The sirens triggered intermittent
false alarms for about an hour and a half until officials deactivated
the system early Saturday morning.</p>
<p>All of the 156 sirens Dallas uses to alert residents to take shelter
from inclement weather went off starting at 11:42 p.m. Friday. City
officials first attributed the incident a “system malfunction.”</p>
<p>The sirens went through about 15 cycles of a 90-second siren
activation, Rocky Vaz, who heads the city’s Office of Emergency
Management, said at a news conference.</p>
<p>“We shut it down as quickly as we could, taking into consideration
all of the precautions and protocols we had to take to make sure that we
were not compromising our 156-siren system,” he said.</p>
<p>Dallas City Manager T.C. Broadnax told reporters Monday the hack was
accessed through the use of radio frequencies, and not remotely through
computer software.</p>
<p>“The issue was with how we transmitted our information, and we’ve
worked to close those gaps,” Broadnax said. “The issue was with how we
transmitted our information and we’ve worked to close those gaps.” </p>
<p>On Monday, the Dallas office of emergency management said in a <a href="https://youtu.be/3tdHKqcYzD0">YouTube</a> video that the system was fully operational.</p>
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